產品詳情

APF 工作原理 Working principle

有源電力濾波器通過外部電流互感器 CT，實時檢測負載電流，并通過內部 DSP 計算，提取出負載電流的諧波成分，然后通過 PWM 信號發送給內部 IGBT，控制逆變器產生一個和負載諧波大小相等、方向相反的電流注入到電網中補償諧波電流，實現濾波功能。 

The active power filter detects the load current in real time through the external current transformer CT, and extracts harmonic components of the load current through internal DSP calculation, and then sends the harmonic components to the internal IGBT through PWM signals to control the inverter to generate a current with the same magnitude and opposite direction as the load harmonic and inject the current into the power grid to compensate the harmonic current, thus realizing the filtering function.